Improve error handling to catch missing untemplated files

Signed-off-by: Lizzie Lundgren <elundgren@seas.harvard.edu>

CHANGELOG.md

@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Updated `components.yaml`. These changes are to support using Spack to build MAPL
   - ESMA_cmake v3.10.0 (add `FindESMF.cmake` from NOAA-EMC)
   - ecbuild geos/v1.2.0 (updat `FindNetCDF.cmake` to that from NOAA-EMC)
+- File not found error handling in ExtData improved for non-templated filenames
 
 ### Removed
 

gridcomps/ExtData/ExtDataGridCompMod.F90

@@ -2113,8 +2113,10 @@ subroutine GetLevs(item, time, state, allowExtrap, rc)
         if (found) then
            call MakeMetadata(file,item%pfioCollection_id,metadata,__RC__)
         else
-           if (allowExtrap .and. (item%cyclic == 'n') ) then
+           if (index(item%file,'%') == 0) then
+              _ASSERT(.false.,'File ' // trim(item%file) // ' not found')
 
+           else if (allowExtrap .and. (item%cyclic == 'n') ) then
               ftime = item%reff_time
               n = 0
               maxOffSet = 100